// COM3336 Operating Systems
// Homework 2 part 1
// John Sung
// Started: 10/22/1999
//


import java.util.*;
import java.io.*;
import File;


// The simple file to signify a simple file. It really doesn't
// add much to the abstract File class.
public class SimpleFile extends File
{
	 
	 // the default constructor
	 public SimpleFile(String fileName)
	 {
		  super(fileName);
	 }


	 //////////////////////////////////////////////////////////////
	 // Abstract methods from the abstract File class



	 // a function to recursively copy a File, with a file
	 // as the parent of the copy. Just returns the
	 // copy of itself.
	 public  File recursiveCopy(File Parent)
	 {
		  return new SimpleFile(getFileName());
	 }
	 

	 // function to implement the "du ." command. The object that
	 // implements this function sould print itself if it's
	 // a directory to the ostream.
	 public  void recursivePrintDirectory(String prefix,
													  PrintStream out)
	 {
		  // don't do anything since, I'm not a directory
	 }
	 
	 

	 
	 // function to implement the directory down command,
	 // returns null if something goes wrong.
	 public  File changeDirectory(String subDirName,
														PrintStream err)
	 {
		  // print some error since this method should
		  // never have been called.
		  err.println("Error changeDirectory() called to a SimpleFile");

		  // return null to signify an error.
		  return null;
	 }
	 

	 // function returns the parent, unless it doesn't have a
	 // parent. Used to implement cd ..
	 public  File getParent()
	 {
		  // print some error since this method should
		  // never have been called.
		  System.out.println("Error getParent() called to a SimpleFile");

		  // return null to signify an error.
		  return null;
	 }
	 

	 // function used to implement the touch command.
	 // it attempts to create a file. Outputs any errors
	 // to err.
	 public  void createFile(String newFileName,
												PrintStream err)
	 {
		  // print some error since this method should
		  // never have been called.
		  err.println("Error createFile() called to a SimpleFile");

	 }
	 

	 // function used to implement the mkdir command.
	 // it attempts to create a directory. Outputs any errors
	 // to err.
	 public  void createDir(String newDirName,
											  PrintStream err)
	 {
		  // print some error since this method should
		  // never have been called.
		  err.println("Error createDir() called to a SimpleFile");

	 }
	 
	 

	 // function used to implement rmdir. Outputs error to
	 // the err PrintStream if something goes wrong.
	 public boolean removeDir(String dirName,
											  PrintStream err)
	 {
		  
		  if (dirName.compareTo(getFileName())==0)
				{
					 err.println("removeDir: " + dirName +
									 " is a file. Not removed.");
					 return false;
				}
		  return false;
		  
	 }
	 
	 
	 // function used to implement rm. Outputs error to
	 // the err PrintStream if something goes wrong.
	 public boolean removeFile(String fileName,
									 PrintStream err)
	 {
	  // if the name matches then remove myself from the parent.
		  if (fileName.compareTo(getFileName())==0)
				{
					 return true;
				}

		  return false;

	 }	 
}